A pneumatic gas storage double-barrel glue gun

Abstract

The present invention discloses a pneumatic gas storage type double-barrel glue gun, comprising a gun body, a first glue pushing cylinder, a second glue pushing cylinder, a first pull rod, a second pull rod, a brake assembly for controlling the locking or movement of the pull rod, and an operating handle for controlling the movement of the brake assembly, the gun body comprising a glue cylinder silo arranged at the front for accommodating AB glue cylinders and an air storage cylinder for storing gas arranged at the rear, two cylinder cavities for accommodating the first glue pushing cylinder and the second glue pushing cylinder are provided in the air storage cylinder, a rear end of the air storage cylinder is provided with a rear end cover, and an air inlet is provided on the air storage cylinder or the rear end cover. The present invention has a simple structure, is light in weight, is easy to operate, can store compressed air, can apply glue while connected to an external air source, and can also work independently without an air source, does not need to be connected to an air charging device at all times, has no air source line interference, is more portable, and can still perform gluing operations when the air source is lacking, thereby avoiding affecting the construction progress.

Description

Technical Field

[0001] The invention relates to a pneumatic air storage type double-barrel glue gun, belonging to the technical field of glue coating. Background Art

[0002] The AB glue guns currently used in the industry are divided into manual glue guns, pneumatic glue guns and electric glue guns. When working, the glue gun needs to push the two components of the glue barrel to squeeze out the glue at the same time, and use the long glue nozzle to make the two components fully and evenly mixed. Therefore, the resistance to glue extrusion is relatively large. Long-term use of manual glue guns causes operator hand fatigue and high labor intensity. Electric glue guns have solved the problem of high labor intensity of operators to a certain extent, but at the same time they face the problems of short battery life, battery need to be charged in advance, and higher failure rate of the whole machine than manual glue guns.

[0003] Therefore, pneumatic glue guns are often used. Pneumatic glue guns use air pressure as the power to apply glue. They are a highly efficient gluing tool. However, they require an external air source to continuously supply air to the glue cylinder for gluing. If there is no external air source or the external air source cannot work at the construction site, the pneumatic glue gun cannot be used, which will greatly affect the construction progress. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a pneumatic gas storage double-barrel glue gun which has a simple structure, is easy to operate, can store gas, and can still perform glue coating operations when there is no external gas source at the construction site.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a pneumatic air storage double-barrel glue gun, comprising a gun body, a first glue pushing cylinder arranged in the gun body, a second glue pushing cylinder, a first pull rod connected to the first glue pushing cylinder, a second pull rod connected to the second glue pushing cylinder, a brake assembly for controlling the locking or movement of the pull rod, and an operating handle for controlling the movement of the brake assembly. The gun body includes a glue cylinder silo arranged at the front for accommodating the glue cylinder and an air storage cylinder arranged at the rear for storing gas. Two cylinder cavities for accommodating the first glue pushing cylinder and the second glue pushing cylinder are provided in the air storage cylinder. The rear end of the air storage cylinder is provided with a rear end cover, and an air inlet is provided on the air storage cylinder or the rear end cover.

[0006] The beneficial effects of the present invention are as follows: the glue gun can be inflated through the air inlet, and the glue gun can be directly connected to an external air source for gluing operations. Of course, when there is no external air source or the external air source cannot work at the construction site, the AB glue gluing operation can be performed independently without the air source. Specifically, the brake assembly does not lock the pull rod, and the glue pushing cylinder moves forward under the action of the compressed air in the air storage cylinder. The front ends of the first and second glue pushing cylinders act on the rear ends of the A glue cylinder and the B glue cylinder respectively, and pressurize and mix the rear blocks and discharge the glue through the gluing nozzle to perform AB glue gluing without affecting the construction progress. The present invention has a simple structure, is light in weight, and is easy to operate. It can store compressed air, can be connected to an external air source for gluing, and can also be separated from the air source to work independently. It does not need to be connected to the inflation equipment at all times, and there is no air source line interference. It is more portable, and can still perform AB glue gluing operations when the air source is lacking, so as to avoid affecting the construction progress.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, an anti-overflow glue mechanism is provided, which includes a first anti-overflow glue cylinder arranged at the front end of the first glue pushing cylinder and a second anti-overflow glue cylinder arranged at the front end of the second glue pushing cylinder. The piston rods of the first anti-overflow glue cylinder and the second anti-overflow glue cylinder are respectively provided with glue pushing heads, and the first anti-overflow glue cylinder and the second anti-overflow glue cylinder are respectively connected to the air path control mechanism through the first anti-overflow glue hose and the second anti-overflow glue hose.

[0009] The beneficial effect of adopting the above further scheme is that, in order to solve the problem of glue overflowing after the glue gun finishes discharging glue, an anti-glue overflow cylinder is added to the front end of the glue pushing cylinder, which can solve the glue overflow problem when the glue coating is finished. During the glue coating operation, the anti-glue overflow cylinder moves forward with the glue pushing cylinder to act on the glue barrel to perform the AB glue coating operation. After the glue coating is completed, the glue pushing cylinder can be stopped by locking the pull rod through the brake assembly. The anti-glue overflow cylinder can be independently controlled by the air circuit control mechanism to release the pressure of the anti-glue overflow cylinder in time to avoid the AB glue from overflowing. The glue gun of the present invention can not only store compressed air, but also does not need to be connected to the inflation equipment at all times, without the interference of the air source line, is more portable, can work independently without the external air source, and can release the pressure in time after the glue coating is completed to prevent the glue gun from overflowing.

[0010] Furthermore, the air circuit control mechanism includes an anti-overflow valve and a control cylinder. The control cylinder is arranged on the fixed handle of the operating handle, and its piston rod is hinged to the movable handle of the operating handle. The anti-overflow valve is arranged on the rear end cover. The control cylinder controls the action of the anti-overflow valve through the control air circuit. Under the action of the control cylinder, the anti-overflow valve connects the air cylinder with the first anti-overflow hose and the second anti-overflow hose during the glue squeezing operation; and releases the pressure of the anti-overflow cylinder in the non-glue squeezing state or the inflated state.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that compressed air is provided by compressing the control cylinder through the movable handle, and the compressed air controls the action of the anti-overflow valve through the control air path. The compressed air will also enter the anti-overflow valve cavity through the anti-overflow air channel, pushing the anti-overflow valve core upward. The anti-overflow valve core is connected to the air storage cylinder and the anti-overflow hose to provide compressed air to the anti-overflow cylinder to push the anti-overflow cylinder forward; when the glue discharge is finished, the control cylinder returns to its position, and the anti-overflow valve core returns to its position under the push of the compressed air in the air storage cylinder, and the anti-overflow air pipe is connected to the outside world to relieve pressure, and the anti-overflow cylinder moves backward to release the residual thrust of the glue pushing cylinder to realize the anti-overflow function.

[0012] Furthermore, the anti-overflow valve includes a valve cavity and a valve core, a pressure relief hole is provided at the top of the valve cavity, the first anti-overflow hose and the second anti-overflow hose are respectively connected to the upper part of the valve cavity, the air storage cylinder is connected to the middle part of the valve cavity, an upper ring platform and a lower ring platform are provided on the valve core, and an annular groove for connecting the air storage cylinder and the first and second anti-overflow hoses is provided between the upper ring platform and the lower ring platform, and the outer diameter of the lower ring platform is larger than the outer diameter of the upper ring platform.

[0013] The beneficial effect of adopting the above-mentioned further solution is that sealing rings are respectively provided on the upper ring platform and the lower ring platform. An annular cavity is formed between the annular groove and the anti-overflow valve cavity. After the anti-overflow valve core moves upward, compressed air from the air reservoir enters the annular cavity through the air inlet. The upper end of the annular cavity is connected to the anti-overflow hose, so that the pressure of the glue pushing cylinder is the same as the pressure of the anti-overflow piston. There is always a space in the anti-overflow cylinder that cannot be compressed. When the movable handle is released, the brake assembly locks the pull rod, the glue pushing cylinder stops moving forward, the anti-overflow valve core moves down to the lowest end, the air path between the air reservoir and the anti-overflow hose is cut off, the anti-overflow hose is connected to the pressure relief hole, the compressed air in the anti-overflow cylinder is released, and the anti-overflow piston loses thrust, thereby preventing glue overflow.

[0014] Furthermore, the brake assembly includes a first brake pad, a second brake pad, a third brake pad, and a fourth brake pad arranged on both sides of the first pull rod, and a brake power mechanism for driving the first brake pad, the second brake pad, the third brake pad and the fourth brake pad to lock or move. The first brake pad, the second brake pad, the third brake pad and the fourth brake pad are provided with slots that cooperate with the first pull rod and the second pull rod, and the control cylinder controls the action of the brake power mechanism by controlling the air circuit.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that the brake block is limited in the movable space formed by the rear cover plate, the brake upper limit block, the brake lower limit block and the fixed cover plate, and the brake power mechanism can contact the left or right side of the brake block to act on the brake block to control the brake block locking rod or control the gap between the brake block and the rod to control the forward movement speed of the rod, thereby controlling the glue extrusion speed of the glue gun.

[0016] Furthermore, the rear end cover is provided with an upper brake limit block, a lower brake limit block and a fixed cover plate, and the upper brake limit block, the lower brake limit block, the fixed cover plate and the rear end cover form a movable space for accommodating the first brake block and the second brake block or the third brake block and the fourth brake block. The brake power mechanism includes an external brake mechanism for driving the first brake block and the fourth brake block and an internal brake mechanism for driving the second brake block and the third brake block. The control cylinder controls the action of the external brake mechanism by controlling the air path and the air storage chamber air path of the air storage chamber.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that the upper and lower limit blocks can guide and limit the movement of the brake block, ensuring that the brake block moves along the direction of the clamping rod. In addition, the rear end cover, upper and lower limit blocks and fixed cover plate form a movable space for accommodating the brake block, ensuring the stability of the brake block on the rear end cover, and also facilitating subsequent maintenance of the brake block.

[0018] Furthermore, the external brake mechanism includes a brake connecting rod and a brake cylinder. The upper end of the brake connecting rod is connected to the rear end cover through a fixing pin, the middle part acts on the first brake block or the fourth brake block, and the lower end is connected to the piston rod of the brake cylinder. The control cylinder is connected to the inner cavity of the brake cylinder through a control air path, and the air storage chamber is connected to the outer cavity of the brake cylinder through an air storage chamber air path.

[0019] The beneficial effect of adopting the above further solution is that the fixed pin is the hinge fulcrum of the brake link. Under the driving action of the brake cylinder, the left and right brake links rotate at their respective hinge fulcrums to realize the control of the rotation angle of the brake link. The principle of the external brake mechanism is to be controlled by two air circuits. One is that the compressed air in the air storage chamber acts on the outer cavity of the brake cylinder through the air storage chamber air circuit, which is used to provide the brake force for the brake link to press the brake pad; the other is provided by the control cylinder. When the control cylinder provides compressed air to act on the inner cavity of the brake cylinder, the pressure of the control air source is used to offset the thrust of the air storage chamber air source acting on the outside of the brake cylinder, so that the pressure of the brake pad is reduced, thereby reducing the braking force of the brake pad to constrain the push rod; the reset of the brake cylinder is reset by the pressure provided by the compressed air in the air storage chamber. When the brake pad cooperates with the locking push rod, the push rod is pushed. The glue cylinder does not move. When gluing is required, the operating handle moves to control the cylinder to compress the air. The compressed air enters the inner cavity of the brake cylinder through the control air path. The pressure of the air source in the control air path offsets the force of the air source in the air storage chamber, thereby reducing the braking force of the brake block on the push rod. The pull rod moves with the glue pushing cylinder. The push rod can move forward under the action of compressed air and act on the glue cylinder through its push block to perform gluing operations. During operation, the glue squeezing speed of the push rod is adjusted by adjusting the pressure of the operating handle to achieve real-time matching of the gluing speed and the pressing force, reducing the difficulty of gluing for the operator and preventing glue breakage or waste of glue due to excessive thickness of the glue strip.

[0020] Furthermore, the internal brake mechanism includes a fixed adjustment block arranged on the rear end cover, a movable adjustment block arranged on both sides of the fixed adjustment block and an adjustment bolt for adjusting the position of the movable adjustment block. A guide slope is provided between the fixed adjustment block and the movable adjustment block. A mounting plate is provided on the rear end cover. The movable adjustment block is connected to the mounting plate through the adjustment bolt, and the movable adjustment block acts on the second brake block or the third brake block.

[0021] The beneficial effect of adopting the above further scheme is that when locking, the brake connecting rod contacts the position surface of the extended activity space of the first brake shoe and the fourth brake shoe, which can control the first brake shoe and the fourth brake shoe to move in the direction of the pull rod and cooperate with the second brake shoe and the third brake shoe to lock the pull rod. When a gap with the pull rod is required, the brake cylinder is actuated by the air source of the air storage chamber and the air source of the control air path, and the brake connecting rod rotates around the fixed pin to move away from the first and fourth brake shoes, which will not produce a large braking effect on the pull rod. Of course, it may also stick to the pull rod, but there is no braking force; for the second brake shoe and the third brake shoe The car block uses the guide inclined surface to adjust the height of the adjusting bolt, and the position of the fixed brake block is adjusted by adjusting the bolt, so as to adjust the movable adjusting block to contact or move away from the brake block surface, and cooperate with other brake blocks to realize the locking or movement control of the pull rod. The brake cylinder can use two cylinders, and the cylinders extend the piston rods to control the brake connecting rod respectively, or a double-piston rod cylinder can be used, and the air circuit layout is simpler. Through the telescopic action of the brake cylinder and the adjustment of the adjusting bolt, the first brake block and the second brake block, the fourth brake block and the third brake block are driven to cooperate to lock the pull rod or make the pull rod move.

[0022] Furthermore, a mounting seat is provided at the bottom of the rear end cover, and an anti-overflow glue air channel, a brake air channel and an air storage chamber air channel are provided in the mounting seat. The control pipeline is connected to the anti-overflow glue air channel and the brake air channel respectively; the air storage chamber is connected to the outer cavity of the brake cylinder through the air storage chamber air channel.

[0023] The beneficial effect of adopting the above further solution is that the mounting seat facilitates the installation and maintenance of the anti-overflow valve, and there is an air channel inside the mounting seat to connect the brake air channel and the anti-overflow air channel, thereby realizing the connection between various pipelines or pipes.

[0024] Furthermore, an inflation chamber is provided on the fixed handle of the operating handle, an inflation port is provided at the inlet of the inflation chamber, and an outlet of the inflation chamber is connected to the air inlet through an inflation pipeline to supply air to the air cylinder.

[0025] The beneficial effect of adopting the above-mentioned further scheme is that the inflation port adopts a one-way valve type inflation port. When inflation is required, the pipeline of the external air source is connected to the inflation port on the movable handle, so that air can be stored in the air cylinder. During the air storage process, the brake assembly acts on the pull rod, and the pull rod is locked to prevent the rubber cylinder from moving forward during the air storage process.

[0026] Furthermore, the rear end cover and / or the mounting seat is also provided with an air supply path connecting the air inlet and the air source.

[0027] The beneficial effect of adopting the above further solution is that the air supply circuit connects the air charging pipeline and the air inlet to supply air to the air cylinder, and the air circuit connection is convenient and fast, and easy to maintain.

[0028] Furthermore, the inflation pipeline and the control air circuit adopt a double-layer tube structure.

[0029] The beneficial effect of adopting the above further solution is that the control air circuit is arranged inside the inflation pipe. Externally, only one pipe is required, which reduces the number of pipes and avoids disorderly interference between pipes. At the same time, it can meet the requirements of air storage in the air reservoir, brake assembly and control of the anti-overflow cylinder.

[0030] Furthermore, the first pull rod is connected to the rear end of the second pull rod.

[0031] The beneficial effect of adopting the above further solution is that the gas in the gas storage cylinder acts on the first rubber pushing cylinder and the second rubber pushing cylinder, and through the connection between the two pull rods, the synchronous rubber pushing action of the first rubber pushing cylinder and the second rubber pushing cylinder is achieved.

[0032] Furthermore, a cylinder seal for guiding the first rubber pushing cylinder and the second rubber pushing cylinder is provided in the air storage cylinder.

[0033] The beneficial effect of adopting the above-mentioned further scheme is that the glue pushing cylinder will act on the back plug of the glue cylinder placed in the glue cylinder silo under the action of compressed air. In order to further ensure the pressure of the compressed air in the air storage cylinder, a cylinder seal for sealing and guiding the glue pushing cylinder is provided on the inner surface of the cylinder cavity inside the air storage cylinder, thereby further increasing the sealing performance of the air storage cylinder.

[0034] Furthermore, the rear end cover is provided with an air outlet, and the air outlet is provided with an air release valve.

[0035] The beneficial effect of adopting the above further solution is that when deflation is required, the air in the air cylinder can be discharged in time by controlling the opening and closing of the air outlet of the air cylinder through the deflation valve.

[0036] Furthermore, the operating handle is connected to the gas cylinder through a tube hoop, and a locking screw is provided on the tube hoop.

[0037] The beneficial effect of adopting the above further solution is that the connection between the operating handle and the gas cylinder is achieved through the tube hoop, the connection is convenient, and the position of the tube hoop on the gas cylinder can be adjusted conveniently and quickly by locking the tube hoop. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0039] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0040] Figure 3 It is a right side structural schematic diagram of the present invention;

[0041] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0042] Figure 5 Schematic diagram of the partial cross-sectional structure of the anti-overflow glue of the present invention;

[0043] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0044] Figure 7 Schematic diagram of the structure of the axial section of the gas storage cylinder of the present invention;

[0045] Figure 8 It is a structural schematic diagram of the brake shoe of the present invention;

[0046] Figure 9 Schematic diagram of the cross-sectional structure of the brake cylinder of the present invention;

[0047] In the figure, 1, rubber silo; 2, air storage cylinder; 3, cylinder hoop; 4, rear end cover; 5, first pull rod; 6, second pull rod; 7, first rubber pushing cylinder; 8, second rubber pushing cylinder; 9, first anti-overflow rubber cylinder; 10, second anti-overflow rubber cylinder; 11, rubber pushing head; 12, first anti-overflow rubber hose; 13, second anti-overflow rubber hose; 14, fixed handle; 15, movable handle; 16, control cylinder; 17, control air path; 18, valve core; 181, upper ring platform; 182, lower ring platform; 183, ring groove; 19, valve cavity; 20, pressure relief hole; 21, mounting seat; 22, anti-overflow rubber air path; 23. Air supply circuit; 24. Brake air channel; 25. Inflating port; 26. Inflating pipe line; 27. Quick connector; 28. First brake pad; 29. ​​Second brake pad; 30. Third brake pad; 31. Fourth brake pad; 32. Brake upper limit block; 33. Brake lower limit block; 34. Fixed cover; 35. Brake cylinder; 36. Brake connecting rod; 37. Rubber cylinder; 38. Glue nozzle; 39. Cylinder seal; 40. Fixing pin; 41. Fixed adjustment block; 42. Movable adjustment block; 43. Adjusting bolt; 44. Air storage chamber circuit; 45. Inner cavity; 46. Outer cavity. DETAILED DESCRIPTION

[0048] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0049] like Figures 1-9 As shown, a pneumatic gas storage type double-barrel glue gun includes a gun body, a first glue pushing cylinder 7 and a second glue pushing cylinder 8 arranged in the gun body, a first pull rod 5 connected to the first glue pushing cylinder 7, a second pull rod 6 connected to the second glue pushing cylinder 8, a brake assembly for controlling the locking or movement of the pull rod and an operating handle for controlling the movement of the brake assembly. The gun body includes a glue cylinder silo 1 arranged at the front for accommodating AB glue cylinders and an air storage cylinder 2 arranged at the rear for storing gas. Two cylinder cavities for accommodating the first glue pushing cylinder 7 and the second glue pushing cylinder 8 are provided in the air storage cylinder 2. The rear end of the air storage cylinder 2 is provided with a rear end cover 4, and an air inlet is provided on the air storage cylinder 2 or the rear end cover 4.

[0050] A glue overflow prevention mechanism is also provided, comprising a first glue overflow prevention cylinder 9 provided at the front end of the first glue pushing cylinder 7 and a second glue overflow prevention cylinder 10 provided at the front end of the second glue pushing cylinder 8. The piston rods of the first glue overflow prevention cylinder 9 and the second glue overflow prevention cylinder 10 are respectively provided with glue pushing heads 11. The first glue overflow prevention cylinder 9 and the second glue overflow prevention cylinder 10 are respectively connected to the air path control mechanism via a first glue overflow prevention hose 12 and a second glue overflow prevention hose 13. In view of the problem that glue guns may overflow glue after finishing glue dispensing, an glue overflow prevention cylinder is added at the front end of the glue pushing cylinder to solve the glue overflow problem when finishing glue application. During the gluing operation, the anti-glue overflow cylinder moves forward with the glue pushing cylinder to act on the glue barrel to perform AB glue gluing operation. After the gluing is completed, the glue pushing cylinder can be stopped by locking the pull rod through the brake assembly. The anti-glue overflow cylinder can be independently controlled by the air circuit control mechanism to release the pressure of the anti-glue overflow cylinder in time to avoid AB glue overflow. The glue gun of the present invention can not only store compressed air, but also does not need to be connected to the inflation equipment at all times, has no air source line interference, is more portable, can work independently without an external air source, and can release the pressure in time after the gluing is completed to prevent the glue gun from overflowing.

[0051] The air circuit control mechanism includes an anti-overflow valve and a control cylinder 16. The control cylinder 16 is arranged on the fixed handle 14 of the operating handle, and its piston rod is hinged to the movable handle 15 of the operating handle. The anti-overflow valve is arranged on the rear end cover 4. The control cylinder 16 controls the action of the anti-overflow valve through the control air circuit 17. Under the action of the control cylinder 16, the anti-overflow valve connects the air cylinder 2 with the first anti-overflow hose 12 and the second anti-overflow hose 13 during the glue squeezing operation; and releases the pressure of the anti-overflow cylinder in the non-glue squeezing state or the inflation state. The control cylinder 16 is compressed by the movable handle to provide compressed air, and the compressed air controls the action of the anti-overflow valve through the control air path 17. The compressed air will also enter the anti-overflow valve cavity 19 through the anti-overflow air channel 22, pushing the anti-overflow valve core 18 upward. The anti-overflow valve core 18 is connected to the air storage cylinder 2 and the anti-overflow hose to provide compressed air for the anti-overflow cylinder to push the anti-overflow cylinder forward; when the glue discharge is finished, a spring is provided on the piston rod of the control cylinder, and the control cylinder 16 returns to its position. The anti-overflow valve core 18 will return to its position under the push of the compressed air in the air storage cylinder 2, and the anti-overflow air pipe is connected to the outside world to relieve pressure. The anti-overflow cylinder moves backward to release the residual thrust of the glue pushing cylinder to realize the anti-overflow function.

[0052] The anti-overflow valve includes a valve chamber 19 and a valve core 18. A pressure relief hole 20 is provided at the top of the valve chamber 19. The first and second anti-overflow hoses 12, 13 are respectively connected to the upper portion of the valve chamber 19. The air reservoir 2 is connected to the middle portion of the valve chamber 19. The valve core 18 is provided with an upper ring platform 181 and a lower ring platform 182. An annular groove 183 is provided between the upper and lower ring platforms 181, 182 for connecting the air reservoir 2 with the first and second anti-overflow hoses 13. The outer diameter of the lower ring platform 182 is larger than that of the upper ring platform 181. A sealing ring is provided on each of the upper and lower ring platforms 181, 182. An annular cavity is formed between the annular groove 183 and the anti-overflow glue valve cavity 19. After the anti-overflow glue valve core 18 moves upward, the compressed air of the air storage cylinder 2 enters the annular cavity through the air inlet, and the upper end of the annular cavity is connected to the anti-overflow glue hose, so that the pressure of the glue pushing cylinder is the same as the pressure of the anti-overflow glue piston. There is always space in the anti-overflow glue cylinder that cannot be compressed. When the movable handle is released, the brake assembly locks the pull rod, the glue pushing cylinder stops moving forward, and the anti-overflow glue valve core 18 moves down to the lowest end. The air path between the air storage cylinder 2 and the anti-overflow glue hose is cut off, the anti-overflow glue hose is connected to the pressure relief hole 20, the compressed air in the anti-overflow glue cylinder is released, and the anti-overflow glue piston loses thrust to prevent glue overflow.

[0053] The brake assembly includes a first brake pad 28, a second brake pad 29, a third brake pad 30, and a fourth brake pad 31, which are arranged on both sides of the first pull rod, and a brake power mechanism for driving the first, second, third, and fourth brake pads to lock or move. The first, second, third, and fourth brake pads are provided with slots that cooperate with the first and second pull rods. The control cylinder controls the movement of the brake power mechanism by controlling the air circuit. The brake pad is limited in the movable space formed by the rear cover plate, the upper brake limit block, the lower brake limit block, and the fixed cover plate. The brake power mechanism can contact the left or right side of the brake pad to act on the brake pad to control the brake pad locking rod or control the gap between the brake pad and the rod to control the forward movement speed of the rod, thereby controlling the glue extrusion speed of the glue gun.

[0054] The rear end cover is equipped with an upper brake stopper 32, a lower brake stopper 33, and a fixed cover plate 34. These upper brake stopper 32, lower brake stopper 33, fixed cover plate 34, and rear end cover 4 form a movable space for accommodating the first and second brake shoes, or the third and fourth brake shoes. Limited by the movable space, the brake shoes can only move in the direction of the clamping rod. The brake power mechanism includes an external brake mechanism for driving the first and fourth brake shoes 28 and 31, and an internal brake mechanism for driving the second and third brake shoes 29 and 30. The control cylinder controls the operation of the external brake mechanism through the control air circuit and the air circuit of the air reservoir chamber. The upper and lower stoppers guide and limit the movement of the brake shoes, ensuring their movement in the direction of the clamping rod. Furthermore, the rear end cover, upper and lower stoppers, and fixed cover plate form a movable space for accommodating the brake shoes, ensuring their stability on the rear end cover and facilitating subsequent maintenance.

[0055] The external brake mechanism includes a brake rod 36 and a brake cylinder 35. The upper end of the brake rod is connected to the rear end cap via a fixed pin 40, the middle portion acts on the first brake pad 28 or the fourth brake pad 31, and the lower end is connected to the piston rod of the brake cylinder 35. The control cylinder communicates with the inner chamber 45 of the brake cylinder via a control air path, and the air reservoir communicates with the outer chamber 46 of the brake cylinder via an air reservoir air path 44. The fixed pin serves as the hinge point for the brake rod. Driven by the brake cylinder, the left and right brake rods rotate at their respective hinge points, controlling the rotation angle of the brake rods. The principle of the external brake mechanism is to be controlled through two air circuits. One circuit is provided by the compressed air in the air storage chamber acting on the outer cavity of the brake cylinder through the air storage chamber air circuit, which is used to provide the braking force for the brake connecting rod to press the brake block; the other circuit is provided by the control cylinder. When the control cylinder provides compressed air to act on the inner cavity of the brake cylinder, the pressure of the control air source is used to offset the thrust of the air source in the air storage chamber acting on the outside of the brake cylinder, so that the pressure of the brake block is reduced, thereby reducing the braking force of the brake block to restrain the push rod; the reset of the brake cylinder is achieved by the pressure provided by the compressed air in the air storage chamber. When the brake block cooperates with the locking push rod, the glue pushing cylinder does not move, and it is required to apply glue. During operation, the operating handle moves, the control cylinder compresses air, and the compressed air enters the inner cavity of the brake cylinder through the control air path. The area of ​​action of the air source of the control air path is larger than the area of ​​action of the air path of the air storage chamber. The pressure of the air source of the control air path offsets the force of the air source of the air storage chamber, thereby reducing the braking force of the brake block on the push rod. The pull rod moves with the glue pushing cylinder, and the push rod can move forward under the action of compressed air and act on the rubber barrel through its push block to perform glue application. During operation, the glue extrusion speed of the push rod is adjusted by adjusting the force of pressing the operating handle, so that the glue application speed and the pressing force are matched in real time, which reduces the difficulty of glue application for the operator and prevents glue breakage or waste of glue due to excessive thickness of the glue strip.

[0056] The internal brake mechanism includes a fixed adjustment block 41 provided on the rear end cover, movable adjustment blocks 42 provided on both sides of the fixed adjustment block, and an adjustment bolt 43 for adjusting the position of the movable adjustment block. A guide bevel is provided between the fixed adjustment block and the movable adjustment block. A mounting plate is provided on the rear end cover. The movable adjustment block is connected to the mounting plate via the adjustment bolt. The movable adjustment block acts on the second brake block or the third brake block. When locked, the brake connecting rod contacts the position of the first brake block and the fourth brake block extending out of the movable space, which can control the first brake block and the fourth brake block to move toward the pull rod and cooperate with the second brake block and the third brake block to lock the pull rod. When a gap with the pull rod is required, the brake cylinder is activated by the air source of the air storage chamber and the air source of the control air path. The brake connecting rod rotates around the fixed pin to move away from the first and fourth brake blocks, without generating a large braking effect on the pull rod. Of course, it may stick to the pull rod, but there is no braking force. For the second and third brake blocks, the height of the adjustment bolt is adjusted by the guide bevel, and the fixed brake block is adjusted by the adjustment bolt. The position of the movable adjusting block is adjusted to contact or move away from the brake block surface, and cooperate with other brake blocks to realize the locking or movement control of the pull rod. The upper end of the brake connecting rod is hinged with the fixed pin, and the lower end is connected with the piston rod of the brake cylinder. The control cylinder can control the movement of the brake cylinder through the air circuit. The brake cylinder can adopt two cylinders, and the cylinders extend the piston rods respectively to control the brake connecting rod, or a double-piston rod cylinder can be used. The air circuit layout is simpler, and the first brake block and the second brake block, the fourth brake block and the third brake block are driven to cooperate to lock the pull rod or make the pull rod move.

[0057] A mounting seat 21 is provided at the bottom of the rear end cover 4, and an anti-overflow glue air channel 22, a brake air channel 24 and an air storage chamber air channel 44 are provided in the mounting seat 21. The control pipeline is connected with the anti-overflow glue air channel 22 and the brake air channel 24 respectively, and the air storage chamber is connected with the outer cavity 46 of the brake cylinder through the air storage chamber air channel 44; the mounting seat 21 facilitates the installation and maintenance of the anti-overflow glue valve, and there is also an air channel inside it that connects the brake air channel 24 and the anti-overflow glue air channel 22 to realize the connection of various pipelines or pipes.

[0058] The fixed handle of the operating handle is provided with an inflation chamber. The inlet of the inflation chamber is provided with an inflation port 25. The outlet of the inflation chamber is connected to the air inlet via an inflation line 26 to supply air to the air reservoir 2. The inflation port 25 utilizes a one-way valve. When inflation is required, an external air source is connected to the inflation port 25 on the movable handle to store air in the air reservoir 2. During the storage process, the brake assembly acts on the pull rod, locking the pull rod to prevent the push cylinder from moving forward during the storage process. Quick-release connectors 27 are provided at each end of the inflation line 26.

[0059] The rear end cover 4 and / or the mounting base 21 are further provided with an air supply path 23 connecting the air inlet and the air source. The air supply path 23 connects the air charging line 26 and the air inlet to supply air to the air reservoir 2, and the air path connection is convenient and fast, and is easy to maintain.

[0060] The inflation line 26 and the control air line 17 utilize a double-layered tube structure. The control air line 17 is located within the inflation line 26. This requires only one tube, reducing the number of tubes and preventing clutter and interference between pipes. While still meeting the requirements of the air reservoir 2 for air storage, the brake assembly, and the control of the anti-overflow cylinder, the tubes are also compatible.

[0061] The rear ends of the first pull rod 5 and the second pull rod 6 are connected. The gas in the gas reservoir 2 acts on the first and second rubber pushing cylinders 7 and 8, and the synchronous rubber pushing action of the first and second rubber pushing cylinders 7 and 8 is achieved through the connection between the two pull rods.

[0062] The air reservoir 2 is provided with a cylinder seal 39 for guiding the first and second rubber pushing cylinders 7 and 8. Under the action of compressed air, the rubber pushing cylinders act on the back plug of the rubber cylinder placed in the rubber cylinder silo 1. In order to further ensure the pressure of the compressed air in the air reservoir 2, a cylinder seal 39 for sealing and guiding the rubber pushing cylinders is provided on the inner surface of the cylinder cavity of the air reservoir 2, further improving the sealing performance of the air reservoir 2.

[0063] Described rear end cover 4 is provided with air outlet, and described air outlet is provided with air release valve.When needing to release air, the opening and closing of air outlet of air reservoir 2 is controlled by air release valve and discharges the air in air reservoir 2 in time.

[0064] The operating handle is connected to the gas cylinder 2 via a tube hoop 3, and a locking screw is provided on the tube hoop 3. The connection between the operating handle and the gas cylinder 2 is achieved through the tube hoop 3, which is convenient to connect, and the position of the tube hoop 3 on the gas cylinder 2 is convenient and quick to adjust by the locking screw.

[0065] During the air reservoir charging phase, the quick-connect charging port is connected to the air source to provide compressed air. This compressed air flows through the fixed handle into the outer air tube of the double-layer air hose, then into the left air tube of the brake seat. From there, it is delivered to the air reservoir through the air supply line between the brake seat and the rear end cap. The compressed air in the air reservoir enters the annular cavity of the anti-overflow valve core through the air hole. Due to the different diameters of the anti-overflow valve core (larger at the bottom and smaller at the top), the compressed air pushes the anti-overflow valve core to the lowest end of the valve hole. At this point, the compressed air is sealed by the O-ring and cannot enter the anti-overflow hose that fills and discharges the anti-overflow cylinder.

[0066] During the gluing phase, glue AB is placed into the glue cylinder chamber. The movable handle pushes the control cylinder to compress air. This compressed air flows through the inner air path of the double-layered air pipe and into the brake seat. Then, through the air path on the right side of the brake seat, it enters the bottom of the anti-overflow valve core, pushing the anti-overflow valve core upward. Once the anti-overflow valve core moves upward, a ring groove connects the air reservoir chamber with the anti-overflow hose. The compressed air in the air reservoir chamber enters the anti-overflow piston through the air hole, then into the anti-overflow hose, where it is then delivered to the sealed chamber of the anti-overflow piston. The anti-overflow piston moves forward, pushing the glue out of the glue cylinder. The movable handle also controls the braking system, releasing some of the brake force. The compressed air in the air reservoir chamber pushes the glue cylinder forward, driving the anti-overflow piston forward as well. Because the pressure of the compressed air pushing the glue cylinder (i.e., the compressed air in the air reservoir chamber) is the same as the pressure in the anti-overflow piston, some braking force still prevents it from moving forward. Therefore, there is always space in the sealed chamber of the anti-overflow piston, preventing it from being compressed. The brake block no longer locks the pull rod, and the compressed air acts on the push cylinder, driving the pull rod forward at the same time, so that the push block acts on the back plug of the rubber cylinder, causing the glue to flow out of the glue nozzle for glue coating operation.

[0067] End of working stage: when the movable handle is released, the brake cylinder is reset by the pressure provided by the compressed air in the air storage chamber. The brake block locks the pull rod under the action of the brake cylinder, the brake system stops and the glue pushing cylinder moves forward, and the compressed air in the control cylinder chamber loses pressure. The anti-glue overflow valve core will be pushed down to the lowest end again by the compressed air in the air storage chamber, and the air path of the compressed air in the air storage chamber and the anti-glue overflow piston is cut off. At the same time, the air path of the anti-glue overflow piston and the pressure relief hole of the rear end cover form a passage. The compressed air in the anti-glue overflow piston is released, and the anti-glue overflow piston loses thrust to achieve the purpose of preventing glue overflow.

[0068] The present invention has the advantages of a simple design structure, light weight, and reduced operator labor intensity. By replacing the inflation head, the air storage glue gun can be inflated using a portable air pump, a compressed air pump, a factory air source, or even a manual inflator. After inflation, the air source connection can be disconnected, enabling portable operation. The glue gun is also designed with a speed control handle. During operation, the pressure of the handle is adjusted to adjust the glue extrusion speed of the internal cylinder, achieving real-time matching of the glue application speed and the pressing force, reducing the operator's glue application difficulty and preventing glue breakage or excessively thick glue strips that waste glue.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic gas storage double-barrel glue gun, characterized in that: The invention comprises a gun body, a first glue-pushing cylinder (7) arranged in the gun body, a second glue-pushing cylinder (8), a first pull rod (5) connected to the first glue-pushing cylinder (7), a second pull rod (6) connected to the second glue-pushing cylinder (8), a brake assembly for controlling the locking or movement of the pull rod, and an operating handle for controlling the movement of the brake assembly. The gun body comprises a glue cylinder silo (1) arranged at the front for accommodating a glue cylinder and a gas storage cylinder (2) arranged at the rear for storing gas. The gas storage cylinder (2) is provided with two cylinder cavities for accommodating the first glue-pushing cylinder (7) and the second glue-pushing cylinder (8). The rear end of the gas storage cylinder (2) is provided with a rear end cover (4). The gas storage cylinder ( 2) or a rear end cover (4) is provided with an air inlet, and an air supply path connecting the air inlet and an air source is provided on the rear end cover (4); an anti-overflow glue mechanism is also provided, and the anti-overflow glue mechanism includes a first anti-overflow glue cylinder (9) arranged at the front end of the first anti-overflow glue cylinder (7) and a second anti-overflow glue cylinder (10) arranged at the front end of the second anti-overflow glue cylinder (8), and the piston rods of the first anti-overflow glue cylinder (9) and the second anti-overflow glue cylinder (10) are respectively provided with a rubber pushing head (11), and the first anti-overflow glue cylinder (9) and the second anti-overflow glue cylinder (10) are respectively connected to the air path control mechanism through a first anti-overflow glue hose (12) and a second anti-overflow glue hose (13).

2. The pneumatic gas storage double-barrel glue gun according to claim 1, characterized in that: The air circuit control mechanism includes an anti-overflow valve and a control cylinder (16). The control cylinder (16) is arranged on the fixed handle (14) of the operating handle, and its piston rod is hinged to the movable handle (15) of the operating handle. The anti-overflow valve is arranged on the rear end cover (4). The control cylinder (16) controls the action of the anti-overflow valve through the control air circuit (17). Under the action of the control cylinder (16), the anti-overflow valve connects the air storage cylinder (2) with the first anti-overflow hose (12) and the second anti-overflow hose (13) during the glue squeezing operation; and releases the pressure of the first anti-overflow cylinder (9) and the second anti-overflow cylinder (10) in the non-glue squeezing state or the inflation state.

3. The pneumatic gas storage double-barrel glue gun according to claim 2, characterized in that: The anti-overflow valve comprises a valve chamber (19) and a valve core (18), a pressure relief hole (20) is provided at the top of the valve chamber (19), the first anti-overflow hose (12) and the second anti-overflow hose (13) are respectively communicated with the upper part of the valve chamber (19), the air storage cylinder (2) is communicated with the middle part of the valve chamber (19), an upper ring platform (181) and a lower ring platform (182) are provided on the valve core (18), an annular groove (183) for connecting the air storage cylinder (2) and the first and second anti-overflow hoses (13) is provided between the upper ring platform (181) and the lower ring platform (182), and the outer diameter of the lower ring platform (182) is larger than the outer diameter of the upper ring platform (181).

4. The pneumatic gas storage double-barrel glue gun according to claim 2, characterized in that: The brake assembly includes a first brake block (28), a second brake block (29) arranged on both sides of the first pull rod, a third brake block (30), a fourth brake block (31) arranged on both sides of the second pull rod, and a brake power mechanism for driving the first brake block, the second brake block, the third brake block and the fourth brake block to lock or move.

5. The pneumatic gas storage double-barrel glue gun according to claim 4, characterized in that: The rear end cover (4) is provided with an upper brake block (32), a lower brake block (33) and a fixed cover plate (34). The upper brake block (32), the lower brake block (33), the fixed cover plate (34) and the rear end cover (4) form an activity space for accommodating the first brake block and the second brake block or the third brake block and the fourth brake block. The brake power mechanism includes an external brake mechanism for driving the first brake block (28) and the fourth brake block (31) and an internal brake mechanism for driving the second brake block (29) and the third brake block (30). The control cylinder (16) controls the action of the external brake mechanism through the control air path (17) and the air storage chamber of the air storage cylinder (2) through the air storage chamber air path.

6. The pneumatic gas storage double-barrel glue gun according to claim 5, characterized in that: The external brake mechanism includes a brake connecting rod (36) and a brake cylinder (35), the upper end of the brake connecting rod is connected to the rear end cover through a fixing pin (40), the middle part acts on the first brake block or the fourth brake block, and the lower end is connected to the piston rod of the brake cylinder, the control cylinder is connected to the inner cavity of the brake cylinder through a control air path, and the air storage chamber is connected to the outer cavity of the brake cylinder through an air storage chamber air path.

7. The pneumatic gas storage double-barrel glue gun according to claim 5, characterized in that: The internal brake mechanism comprises a fixed adjustment block (41) arranged on the rear end cover, movable adjustment blocks (42) arranged on both sides of the fixed adjustment block, and an adjusting bolt (43) for adjusting the position of the movable adjustment block, a guide inclined surface is provided between the fixed adjustment block (41) and the movable adjustment block (42), a mounting plate is provided on the rear end cover (4), the movable adjustment block (42) is connected to the mounting plate via the adjusting bolt (43), and the movable adjustment block (42) acts on the second brake block or the third brake block.

8. The pneumatic gas storage double-barrel glue gun according to claim 2, characterized in that: An air-charging chamber is provided on the fixed handle (14) of the operating handle, an air-charging port (25) is provided at the inlet of the air-charging chamber, and an outlet of the air-charging chamber is connected to the air inlet via an air-charging pipe (26) to supply air to the air cylinder (2), and the air-charging pipe (26) and the control air circuit (17) adopt a double-layer tube structure.

9. The pneumatic gas storage double-barrel glue gun according to any one of claims 1 to 8, characterized in that: The first pull rod (5) is connected to the rear end of the second pull rod (6).

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